FDB33N25TM N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The FDB33N25TM is an N-Channel MOSFET manufactured by onsemi, rated for 250V drain-to-source voltage with a continuous drain current of 33A at 25°C. This device operates in the UniFET™ series and is housed in a Surface Mount TO-263 (D2PAK) package. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance parameters align within acceptable tolerances for the application, maintaining compatibility with the TO-263-3 D2PAK package footprint and supporting the same voltage class and thermal operating range.

Substiute Parts

FDB33N25TM

onsemiIn Stock: 30171FDB33N25TM Datasheet

Current PartRFQ

IPB17N25S3100ATMA1

Infineon TechnologiesIn Stock: 90207IPB17N25S3100ATMA1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FDB33N25TM are identified based on the following critical parameters that determine functional equivalence:

Voltage Class Compatibility: Both the main part and substitute must operate at 250V Vdss to maintain circuit voltage rating integrity.

Package Footprint: All parts must use the TO-263-3 D2PAK (2 Leads + Tab) Surface Mount package to ensure PCB layout compatibility without redesign.

FET Technology: N-Channel MOSFET (Metal Oxide) technology is required for functional equivalence in switching applications.

Regulatory Compliance: RoHS3 compliance and REACH unaffected status ensure environmental and regulatory alignment.

Current Rating Consideration: While the substitute part may have a lower continuous drain current rating (17A versus 33A), it remains functionally equivalent for applications where the actual operating current does not exceed the substitute's rating. The substitute's lower current rating represents a derating scenario rather than a functional incompatibility.

Thermal Operating Range: The substitute part extends the upper operating temperature to 175°C, providing broader thermal capability than the main part's 150°C maximum.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (FDB33N25TM): Use the FDB33N25TM when the application requires the full 33A continuous drain current rating and operates within the -55°C to 150°C temperature range. This part is Active and maintains full RoHS3 compliance with unlimited MSL rating.

Substitute Selection (IPB17N25S3100ATMA1): The IPB17N25S3100ATMA1 serves as a functional substitute when the application current requirement does not exceed 17A continuous drain current. This Infineon part provides extended thermal operating range to 175°C and carries AEC-Q101 automotive qualification. Both parts maintain identical 250V voltage rating, 10V drive voltage, and TO-263-3 package compatibility. The substitute's lower gate charge (19nC versus 48nC) results in reduced switching losses.

Compliance Alignment: Both parts are Active products with ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity level, ensuring regulatory and environmental compatibility in equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can the IPB17N25S3100ATMA1 directly replace the FDB33N25TM on the PCB?

A: Yes, both parts use the TO-263-3 D2PAK Surface Mount package with identical pinout and footprint. No PCB layout modification is required for physical substitution.

Q: What is the primary difference between these two parts?

A: The main difference is the continuous drain current rating: FDB33N25TM is rated for 33A while IPB17N25S3100ATMA1 is rated for 17A. Both maintain the same 250V voltage class and 10V drive voltage. The substitute also provides extended temperature range to 175°C and lower gate charge characteristics.

Q: When should I use the substitute part instead of the primary part?

A: Use the IPB17N25S3100ATMA1 when your application's actual continuous drain current requirement is 17A or less. The substitute is also preferred for applications requiring automotive qualification (AEC-Q101) or extended thermal operation to 175°C.

Q: Are there any thermal considerations when substituting?

A: The FDB33N25TM has a maximum power dissipation of 235W while the IPB17N25S3100ATMA1 is rated for 107W. Verify that your thermal design accommodates the lower power dissipation rating of the substitute part.

Q: Do both parts have the same gate charge characteristics?

A: No. The FDB33N25TM has a maximum gate charge of 48nC at 10V, while the IPB17N25S3100ATMA1 has 19nC at 10V. The lower gate charge of the substitute results in faster switching transitions and reduced driver power requirements.

Q: Are both parts RoHS compliant?

A: Yes, both the FDB33N25TM and IPB17N25S3100ATMA1 are ROHS3 compliant with REACH unaffected status and unlimited moisture sensitivity level (MSL 1).

Q: What is the difference in on-resistance between these parts?

A: The FDB33N25TM has Rds On of 94mOhm at 16.5A and 10V gate voltage. The IPB17N25S3100ATMA1 has Rds On of 100mOhm at 17A and 10V gate voltage. The difference is minimal and within typical manufacturing tolerances for this voltage class.